On one of my test devices, an iPod Touch MC086FD (next generation, with rounded back and built in speaker, bad display compared to first gen ipod touch), I am getting a VERY serious bug:
When a table view scrolls, the corners of the table view and some views around the table view start to flash. when the table view scrolls, the flash frequency gets lower, but when it stops, the views flash visible/invisible like 30 fps or so.
I can't reproduce that problem with same app on other devices running other OS versions. Maybe someone knows about that?